Cutting tool



0a. 22, 1935. R, RANDLE A 2,018,149

CUTTING TOOL Filed 001;. 10, 1934 IRA R.RANDLE HERBERT R. No Cum: INVENTORS FIG. 3 2 2 ATTORNEY UNITED STATES PATENT OFFICE CUTT1NG TOOL Ira a. male Mia Herbert a. McCune,

' Decatur, Ill.

' Application October 10, 1934, Serial No. 747,717

2 Claims.

Our invention relates to cutting devices, and particularly to tools of that class in which an edged tool is adjustably mounted in a frame or holder for making line cuts through sheets or into material at a predetermined depth.

The chief object of our invention is to provide an adjustable cutting tool for cutting through the wrappings of commercial packages such as those containing cigarettes, candy, and the like, withlO out cutting into or mutilating the carton.

A further object of the invention is to provide an adjustable cutting tool which may be utilized to out long cartons into shorter sections without danger of injury to the smaller individual containers within the carton.

A general objectof our invention is to provide an adjustable edged cutting tool, suitable for a variety of purposes, and of simple and inexpensive construction.

In the drawing accompanying this specification and forming a part thereof:

Fig. 1 is a perspective view of my improved cutting tool;

Fig. 2 is a side elevation thereof;

Fig. 3 is a bottom plan view;

Fig. 4 is an end view;

Fig. 5 is a transverse section taken on the line Fig. 6 is a side view showing one half'section of the holder removed and with the cutting blade exposed to view;

Fig. 7 is a view of the detached half section removed from Fig. 6; and I Fig. 8 is an end view of the cutting blade with adjusting screw.

Referring to the drawing, like reference numerals indicate like parts in the several views.

The frame or blade holder comprises a pair of plate members I and 2 of any suitable material,

which are the same contour, thickness, and general formation, so that a detailed description of one, of said members will sumce to explain the peculiar construction of each.

Referring to Fig. 6 it will be seen that the plate member I has through openings 3 and 4 near itsopposite ends which in assembled position register with corresponding openings 3 and 4' in the plate member 2, the outer terminals of one set of openings being countersunk as indicated at 5 in Fig. 7, to receive the enlarged tapered heads 6 and l of the screws 8 and 9 by means of which the members I and 2 are rigidly secured together. The opposite ends of the screws 8 and 9 extend only to the outer surface of the plate member I so that such as aluminum, wood, or fibre composition,

the holder presents a smooth and uninterrupted surface free from danger of injury to the hand of the user. Y

There is formed in the inner surface of the plate member I a depression III of substantially 5 triangular shape, merging into a deeper recess II near its wider end, said recess extending at right angles to the triangular depression to form a channel I2. A through window I3 is formed across the channel I2 near its outer end and at 10 right angles thereto. Duplicate formations III, II, I2', and l3 are provided in plate member 2, all for a purpose which will now be described.

For a cutting blade we prefer to employ one of several makes safety razor blades now on the market in which the blade, I4 is carried by a carrier I5. Such blades are of high quality and are inexpensive. 1

In the construction of our improved cutting tool I attach a screw It to the blade carrier It by forming a slot I! in the end of the screw I6 and inserting the carrier in this slot. A circular knurled adjusting nut I8 mounted on the adjust- 'ing screw completes the parts required for the hers I and 2 to be manipulated by the fingers of the user. The channel I2 is slightly wider at its inner than at its outer end to permit angular movement of the adjusting screw I6 within said channel. Obviously, when plate member} is assembled with plate member I the different com- I plementary elements will register and complete the construction.

It will be observed that the contour of plate members I and 2 is such as to provide a convenient grip for the user of the tool, it being intended that the palm of the hand will engage the heel IQ of the holder, and that the forefinger engage the curved front. 20.

As shown in Figs. 4 and 5 the upper portion 2| of the holder is thicker than the intermediate portion 22, and that the lower edge of the holder terminates in a foot 23, the engaging surface of which consists of corrugations 24, to 50 facilitate the sliding of the holder in a straight line during the cutting operation.

It will be seen by reference to Fig. 2 that by rotation of the adjusting nut I8 on the screw I6 the oreward end of the blade It may be forced a a.- predetermined distance .beyond the corrugated surface of the foot 23, so that if'desired it may be adjusted to slit the Cellophane wrapper on a carton of cigarettes or the like without danger of cutting \into the carton, or it may be used to cut the carton into sections without injury to the small packages inside.

The inner surface of each of the plate members l and 2 is slightly concaved opposite the blade portion of the cutting .member to form an elongated opening 25 (see Fig. 3) through which the blade I4 is adapted to be moved without placing the walls of the plate members und'er strain.

As shown in Fig. 2 thecutting operation is performed by the foreward end of the blade and preferably by moving the holder in the direction indicated by the arrow to insure cutting without tearing the material.

It is to be understood that changes in the details of construction of our improved cutting device may' be made within the scope of the appended claims without departing from the spirit of our invention.

distance beyond the contact surface of said foot. 2. A line cutting device comprising a holder formed of a pair of plate members, said members being suitably curved androunded about their upper edges to provide a hand and finger 5 grip and having an intermediate portion of reduced thickness and terminating at their lower ends in a foot having its contact surface formed of corrugations extending the entire length of said holder, a substantially triangular depreslo sion in the inner surface of each of said plate members forming a shallow recess extending horizontally and other depressions at right-angles thereto forming a vertical recess, slightly c'oncaved portions in the inner surfaces of said plate 15 7 members forming a recess extending" fromthe, first mentioned recess to the contact surface of said foot, said last named recess being of less depth than the first named recess, a substantial- 1y U-shapedblade carrier mounted in the first 20 named horizontal recess, adapted for angular movement therein, an edged cutting blade carried by said carrier, an vadjusting screw con- ,nected to said carrier and mounted in said vertical recess, an adjusting nut mounted on said 25 screw and in engagement with the walls of'an opening through said holder. for moving one end of said blade at predetermined distance beyond the contact surface of said vtoot, said blade moving in said lowermost recess in said holder formed 30 by said concave portions, and said plate members being secured together by removable screws to permit replacement of ,blades.

IRA R. RANDLE. HERBERT R. MOCUNE. 

